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E: enquiry@qilumetal.com
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36NiCrMo16 / 1.6773 is a high-strength alloy steel belonging to the European standard EN 10083-3 and EN 10250-3. It is widely used in demanding industries such as aerospace, automotive engineering, heavy machinery, and high-performance components due to its exceptional mechanical properties.
36NiCrMo16 is a Ni-Cr-Mo alloy steel with a carbon content of 0.32-0.39%, offering excellent hardenability, toughness, and fatigue resistance. After quenching and tempering, it achieves a superior combination of high tensile strength, impact resistance, and wear durability, making it ideal for critical structural components, gears, shafts, and high-stress applications.
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DIN 36NiCrMo16 1.6773 belongs to the European standard specifications EN 10083-3 (for quenched and tempered alloy steels) and EN 10250-3 (for open die forgings), defining its chemical composition, mechanical properties, and heat treatment requirements. At its core, this alloy is a nickel-chromium-molybdenum (Ni-Cr-Mo) steel with a carbon content ranging from 0.32-0.39% —a formulation that balances hardenability, tensile strength, and impact resistance, setting it apart from standard carbon steels.
What makes DIN 36NiCrMo16 1.6773 unique is its ability to retain superior mechanical properties even after quenching and tempering (QT)—a heat treatment process that involves heating the steel to a critical temperature, rapid cooling (quenching), and subsequent tempering to reduce brittleness. This process results in a material with a rare combination of high tensile strength (up to 1450Mpa for small sizes), excellent fatigue resistance, and wear durability—qualities that make it indispensable for components subjected to high stress, repeated loads, or harsh operating environments.
Hunan Qilu Steel enhances the value of this alloy further by offering flexible production options, including cold-drawn bars, hot-rolled bars, open die forgings, and hot-rolled plates. Each product undergoes strict quality control, from raw material selection to final surface finishing, ensuring compliance with EN standards and customer-specific requirements. Whether for small-batch precision parts or large-scale industrial components, DIN 36NiCrMo16 1.6773 is designed to deliver consistent performance across diverse applications.
The chemical makeup of DIN 36NiCrMo16 1.6773 is tailored to optimize its mechanical behavior, with each alloying element serving a critical role:
Carbon (C: 0.32-0.39%): Provides the base strength and hardenability, enabling the steel to achieve high tensile values after heat treatment.
Nickel (Ni: 3.6-4.1%): A key contributor to toughness and fatigue resistance, nickel reduces brittleness at low temperatures and enhances the steel’s ability to withstand repeated cyclic loads—essential for components like crankshafts and gears.
Chromium (Cr: 1.6-2.0%): Improves surface hardness, wear resistance, and corrosion resistance, protecting the steel from environmental damage and extending the lifespan of high-contact parts.
Molybdenum (Mo: 0.25-0.45%): Boosts high-temperature strength and hardenability, ensuring uniform hardness across thick sections of the steel—critical for large forgings like turbine shafts.
Silicon (Si: Max 0.4%) & Manganese (Mn: 0.5-0.8%): Act as deoxidizers during production, refining the steel’s microstructure and enhancing its overall mechanical stability.
Phosphorus (P: Max 0.025%) & Sulfur (S: Max 0.025%): Kept at ultra-low levels to minimize brittleness and improve weldability (though special handling is still required for welding).
This composition ensures DIN 36NiCrMo16 1.6773 outperforms many other alloy steels in scenarios where strength, toughness, and durability must coexist.
The mechanical properties of DIN 36NiCrMo16 1.6773 are standardized under EN 10083-3 (for rolled/drawn products) and EN 10250-3 (for forgings), with performance varying slightly by size to account for heat treatment uniformity. Key properties include:
Size range d≤16mm (or t≤8mm): Tensile strength 1250-1450Mpa, yield strength 1050Mpa min, elongation 9% min, reduction of area 40% min.
Size range 16＜d≤40mm (or 8＜t≤20mm): Tensile strength 1250-1450Mpa, yield strength 1050Mpa min, elongation 9% min, reduction of area 40% min, impact value (room temperature) 30J min.
Size range 40＜d≤100mm (or 20＜t≤60mm): Tensile strength 1100-1300Mpa, yield strength 900Mpa min, elongation 10% min, reduction of area 45% min, impact value 35J min.
Size range 100＜d≤250mm (or 60＜t≤160mm): Tensile strength 1000-1200Mpa, yield strength 800Mpa min, elongation 11% min, reduction of area 50% min, impact value 45J min.
Across size ranges (d≤160mm, 160＜d≤330mm, 330＜d≤660mm), the steel maintains: Tensile strength 1000Mpa min, yield strength 800Mpa min, longitudinal elongation 11% min, transverse elongation 8% min, longitudinal impact value (room temperature) 45J min, transverse impact value 22J min.
These properties make DIN 36NiCrMo16 1.6773 suitable for components that must endure extreme mechanical stress, such as heavy machinery shafts and aerospace landing gear.
Hardenability—the ability of steel to achieve uniform hardness across its cross-section—is a standout feature of DIN 36NiCrMo16 1.6773, supported by its high Ni and Mo content. Key hardness specifications include:
Flame/Induction Hardening: Achieves a surface hardness of 53HRC—ideal for parts requiring wear-resistant surfaces (e.g., gear teeth).
Soft Annealing (+A): Reduces hardness to HB269 max, making the steel easy to machine before final heat treatment.
Quenched & Tempered (+QT): Common hardness range of HRC28-32, balancing strength and machinability for post-QT processing.
For applications requiring controlled hardenability, three grades are available:
+H (Normal Hardenability): Hardness ranges from 50-57HRC (1.5mm from quenched end) to 47-55HRC (50mm from quenched end).
+HH (High Hardenability): Minimum hardness at 1.5mm is 52HRC (vs. 50HRC for +H), ensuring deeper hardening.
+HL (Low Hardenability): Maximum hardness at 1.5mm is 55HRC (vs. 57HRC for +H), suitable for thin-section parts.
Hunan Qilu Steel offers DIN 36NiCrMo16 1.6773 in a range of forms to match customer needs, with strict tolerance controls for precision applications:
Product Type | Size Range | Length | Surface Finish & Tolerance |
Cold Drawn Bar | Φ3-Φ80mm | 6000-9000mm | Turned (+0/+3mm), Ground (+0/+0.05mm), Polished (+0/+0.05mm); Straightness 1mm/1000mm max |
Hot Rolled Bar | Φ16-Φ310mm | 6000-9000mm | Peeled (+0/+0.1mm), Black Rolled (+0/+1mm); Straightness 3mm/1000mm max |
Hot Forged Bar | Φ100-Φ1200mm | 3000-5800mm | Black Forged (+0/+5mm) |
Hot Rolled Plate/Sheet | Thickness 3-200mm; Width 1500-2500mm | 2000-5800mm | Black Rolled or Machined; Tolerance +0/+3mm (milled) |
Hot Forged Block | Thickness 80-800mm; Width 100-2500mm | 2000-5800mm | Black Forged or Machined |
Note: Due to low domestic demand in China, hot-rolled and hot-forged bars are not stocked; production is custom-ordered with a minimum order quantity (MOQ) of 10 tons.
DIN 36NiCrMo16 1.6773 is trusted in industries where failure of components could lead to costly downtime or safety risks. Its high strength, toughness, and wear resistance make it ideal for the following critical applications:
The aerospace sector demands materials that can withstand extreme loads, temperature fluctuations, and fatigue. DIN 36NiCrMo16 1.6773 is used to manufacture:
Aircraft Landing Gear: Requires high tensile strength (up to 1450Mpa for small parts) and impact resistance to absorb landing shocks.
Engine Drive Shafts: Benefits from the steel’s fatigue resistance (enhanced by Ni) to endure thousands of rotational cycles.
Turbine Components: Mo content boosts high-temperature strength, making it suitable for turbine blades and casings in jet engines.
In high-performance and heavy-duty vehicles (e.g., racing cars, trucks), DIN 36NiCrMo16 1.6773 is used for:
Engine Crankshafts & Connecting Rods: These parts endure cyclic bending and torsional stress; the steel’s 1000-1450Mpa tensile strength and 30-45J impact value prevent cracking.
Transmission Gears: Flame-hardened surfaces (53HRC) resist wear, while the core’s toughness (HRC28-32) absorbs shock during gear meshing.
For machinery operating in mining, construction, or power generation, the steel’s durability is critical:
Large Diesel Engine Crankshafts: Used in marine or industrial generators, where size (up to Φ660mm forgings) and load require uniform hardness and strength.
Mining Machinery Gears & Bearings: Wear resistance from Cr and Mo ensures longevity in dusty, high-load environments.
Gas Turbine Shafts: Withstands high rotational speeds and temperatures, thanks to Mo-enhanced high-temperature stability.
In industries like tooling and robotics, DIN 36NiCrMo16 1.6773 is chosen for:
High-Load Bearings: Tight tolerances (e.g., +0/+0.05mm for ground surfaces) ensure smooth operation, while the steel’s toughness prevents premature failure.
Precision Shafts: Low sulfur content (Max 0.025%) reduces machining defects, making it suitable for parts requiring tight dimensional accuracy.
AISI 4340 (equivalent to DIN 36CrNiMo4 1.6511) is a common high-strength alloy steel, but DIN 36NiCrMo16 1.6773 offers key advantages:
Higher nickel content (3.6-4.1% vs. 1.6-2.0% in AISI 4340) delivers superior toughness and fatigue resistance, making it better for cyclic-load applications.
Higher tensile strength (up to 1450Mpa vs. ~1250Mpa for AISI 4340) suits more demanding stress environments.
Better hardenability (via Mo and Ni) ensures uniform hardness in thicker sections (up to Φ1200mm forgings), whereas AISI 4340 may struggle with hardness uniformity in large parts.
The standard MOQ is 10 tons. This is because DIN 36NiCrMo16 1.6773 has limited domestic demand in China, so stockists do not maintain inventory. Custom production requires melting, forging, and heat treatment processes that are cost-effective only for larger batches. Hunan Qilu Steel can sometimes accommodate smaller orders for cold-drawn bars (Φ3-Φ80mm) with extended lead times—contact our team for details.
DIN 36NiCrMo16 1.6773 has relatively poor weldability due to its carbon content (0.32-0.39% > 0.25%, the threshold for reduced weldability) and high alloy content. To minimize cracking:
Preheat the steel to 200-300℃ before welding to reduce thermal stress.
Use low-hydrogen electrodes (e.g., E8018-B2) to prevent hydrogen-induced cracking.
Maintain a slow cooling rate after welding (e.g., post-weld annealing at 600-650℃) to relieve internal stress.
Avoid welding thick sections (>50mm) without preheating, as this increases cracking risk.
Three key heat treatment processes are used, depending on the application:
Soft Annealing: Heat to 650-700℃, hold for 2-4 hours, then cool in the furnace. Goal: Reduce hardness to HB269 max for easy machining.
Normalizing: Heat to 880-950℃, hold for 1-2 hours, then cool in air. Goal: Refine the microstructure and prepare the steel for quenching.
Quenching & Tempering (QT): Heat to 865-885℃ (upper end for oil quenching, lower end for water quenching), quench in water/oil/air, then temper at 550-650℃ for 2-3 hours. Goal: Achieve the desired balance of strength (1000-1450Mpa) and toughness (30-45J impact value), with a hardness of HRC28-32.
Yes. We offer a range of custom testing and certifications to meet international standards and customer requirements, including:
Mechanical testing (tensile, impact, hardness) per EN 10002-1, EN 10045-1, and EN ISO 6508-1.
Chemical composition analysis via optical emission spectroscopy (OES) or X-ray fluorescence (XRF).
Non-destructive testing (NDT) such as ultrasonic testing (UT) per EN 10160 or magnetic particle testing (MT) per EN 10228-1.
Certifications including EN 10204 3.1B (mill test certificate) or 3.2 (independent inspection certificate) for critical applications like aerospace.
1: Steel equivalent
Country | Europe |
Standard | EN10083-3 |
Grade | 36NiCrMo16/1.6773 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
36NiCrMo16/1.6773 | 0.32-0.39 | 0.4Max | 0.5-0.8 | 0.025Max | 0.025Max | 1.6-2.0 | 0.25-0.45 | 3.6-4.1 |
3: Mechanical properties .
Mechanical properties for 36NiCrMo16 quenching and tempering alloy steel according to EN10083-3.
Size range | Tensile strength | Yield strength | Alongation | Area of reduction | Impact value At RT/J |
d≤16 t≤8 | 1250-1450Mpa | 1050Mpa Min | 9% Min | 40% Min | / |
16＜d≤40 8＜t≤20 | 1250-1450Mpa | 1050Mpa Min | 9% Min | 40%Min | 30J Min |
40＜d≤100 20＜t≤60 | 1100-1300Mpa | 900Mpa Min | 10% Min | 45%Min | 35J Min |
100＜d≤160 60＜t≤100 | 1000-1200Mpa | 800Mpa Min | 11% Min | 50%Min | 45J Min |
160＜d≤250 100＜t≤160 | 1000-1200Mpa | 800Mpa Min | 11% Min | 50%Min | 45J Min |
Sampling and preparation of test pieces for 36NiCrMo16 quenching and tempering steel.
1): According to EN10083-1, all samples shall be taken at a distance of 12.5mm below the heat treated surface
2): As stipulated in the contract between buyer and seller.
Mechanical properties for 36NiCrMo16 open die forgings steel according to EN10250-3
Size range | Tensile strength | Yield strength | Alongation | Impact value at RT/J | ||
L | Tr | L | Tr | |||
d≤160 | 1000Mpa Min | 800Mpa Min | 11% Min | 8% Min | 45J Min | 22J Min |
160＜d≤330 | 1000Mpa Min | 800Mpa Min | 11% Min | 8% Min | 45J Min | 22J Min |
330＜d≤660 | 1000Mpa Min | 800Mpa Min | 11% Min | 8% Min | 45J Min | 22J Min |
Remark: L= Longitudinal Tr = Transverse
Sampling and preparation of test pieces for steel forging.
1: According to EN10250-1, all samples shall be taken at a distance of 4/T below the heat treated surface (with a minimum of 20mm and a maximum of 80mm), and t/2 from the end (where t is the equivalent thickness of the thickness of the ruling section of the forging at the time of heat treatment.
2: As stipulated in the contract between buyer and seller.
4: Surface hardness and hardenability.
Heat Treatment | Hardness |
Flame or Induction hardening | 53HRC |
Soft annealed (+A) | HB269Max |
Quenched and tempred (+QT) | HRC28-32(Common Range) |
Where the steel is ordered by using the symbols for normal (+H) or restricted (+HL, +HH) hardenability requirements, the hardenability values should apply below:
Distance in mm from quenched end | ||||||||||||||||
Distance | 1.5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | |
Hardness In HRC + H | max | 57 | 56 | 56 | 56 | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
min | 50 | 49 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | |
Hardness In HRC + HH | max | 57 | 56 | 56 | 56 | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
min | 52 | 51 | 51 | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | |
Hardness In HRC + HL | max | 55 | 54 | 53 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 |
min | 50 | 49 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | |
Scatter bands for the Rockwell - C hardness in the end quench hardenability test.
5: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Cold drawn bar | Φ3-Φ80mm | 6000-9000mm |
Hot rolled bar | Φ16-Φ310mm | 6000-9000mm |
Hot forged bar | Φ100-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:3-200mm; W:1500-2500mm | 2000-5800mm |
Hot Forged block | T: 80-800mm; W: 100-2500mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
DIN 36NiCrMo16 1.6773 belongs to the European standard specifications EN 10083-3 (for quenched and tempered alloy steels) and EN 10250-3 (for open die forgings), defining its chemical composition, mechanical properties, and heat treatment requirements. At its core, this alloy is a nickel-chromium-molybdenum (Ni-Cr-Mo) steel with a carbon content ranging from 0.32-0.39% —a formulation that balances hardenability, tensile strength, and impact resistance, setting it apart from standard carbon steels.
What makes DIN 36NiCrMo16 1.6773 unique is its ability to retain superior mechanical properties even after quenching and tempering (QT)—a heat treatment process that involves heating the steel to a critical temperature, rapid cooling (quenching), and subsequent tempering to reduce brittleness. This process results in a material with a rare combination of high tensile strength (up to 1450Mpa for small sizes), excellent fatigue resistance, and wear durability—qualities that make it indispensable for components subjected to high stress, repeated loads, or harsh operating environments.
Hunan Qilu Steel enhances the value of this alloy further by offering flexible production options, including cold-drawn bars, hot-rolled bars, open die forgings, and hot-rolled plates. Each product undergoes strict quality control, from raw material selection to final surface finishing, ensuring compliance with EN standards and customer-specific requirements. Whether for small-batch precision parts or large-scale industrial components, DIN 36NiCrMo16 1.6773 is designed to deliver consistent performance across diverse applications.
The chemical makeup of DIN 36NiCrMo16 1.6773 is tailored to optimize its mechanical behavior, with each alloying element serving a critical role:
Carbon (C: 0.32-0.39%): Provides the base strength and hardenability, enabling the steel to achieve high tensile values after heat treatment.
Nickel (Ni: 3.6-4.1%): A key contributor to toughness and fatigue resistance, nickel reduces brittleness at low temperatures and enhances the steel’s ability to withstand repeated cyclic loads—essential for components like crankshafts and gears.
Chromium (Cr: 1.6-2.0%): Improves surface hardness, wear resistance, and corrosion resistance, protecting the steel from environmental damage and extending the lifespan of high-contact parts.
Molybdenum (Mo: 0.25-0.45%): Boosts high-temperature strength and hardenability, ensuring uniform hardness across thick sections of the steel—critical for large forgings like turbine shafts.
Silicon (Si: Max 0.4%) & Manganese (Mn: 0.5-0.8%): Act as deoxidizers during production, refining the steel’s microstructure and enhancing its overall mechanical stability.
Phosphorus (P: Max 0.025%) & Sulfur (S: Max 0.025%): Kept at ultra-low levels to minimize brittleness and improve weldability (though special handling is still required for welding).
This composition ensures DIN 36NiCrMo16 1.6773 outperforms many other alloy steels in scenarios where strength, toughness, and durability must coexist.
The mechanical properties of DIN 36NiCrMo16 1.6773 are standardized under EN 10083-3 (for rolled/drawn products) and EN 10250-3 (for forgings), with performance varying slightly by size to account for heat treatment uniformity. Key properties include:
Size range d≤16mm (or t≤8mm): Tensile strength 1250-1450Mpa, yield strength 1050Mpa min, elongation 9% min, reduction of area 40% min.
Size range 16＜d≤40mm (or 8＜t≤20mm): Tensile strength 1250-1450Mpa, yield strength 1050Mpa min, elongation 9% min, reduction of area 40% min, impact value (room temperature) 30J min.
Size range 40＜d≤100mm (or 20＜t≤60mm): Tensile strength 1100-1300Mpa, yield strength 900Mpa min, elongation 10% min, reduction of area 45% min, impact value 35J min.
Size range 100＜d≤250mm (or 60＜t≤160mm): Tensile strength 1000-1200Mpa, yield strength 800Mpa min, elongation 11% min, reduction of area 50% min, impact value 45J min.
Across size ranges (d≤160mm, 160＜d≤330mm, 330＜d≤660mm), the steel maintains: Tensile strength 1000Mpa min, yield strength 800Mpa min, longitudinal elongation 11% min, transverse elongation 8% min, longitudinal impact value (room temperature) 45J min, transverse impact value 22J min.
These properties make DIN 36NiCrMo16 1.6773 suitable for components that must endure extreme mechanical stress, such as heavy machinery shafts and aerospace landing gear.
Hardenability—the ability of steel to achieve uniform hardness across its cross-section—is a standout feature of DIN 36NiCrMo16 1.6773, supported by its high Ni and Mo content. Key hardness specifications include:
Flame/Induction Hardening: Achieves a surface hardness of 53HRC—ideal for parts requiring wear-resistant surfaces (e.g., gear teeth).
Soft Annealing (+A): Reduces hardness to HB269 max, making the steel easy to machine before final heat treatment.
Quenched & Tempered (+QT): Common hardness range of HRC28-32, balancing strength and machinability for post-QT processing.
For applications requiring controlled hardenability, three grades are available:
+H (Normal Hardenability): Hardness ranges from 50-57HRC (1.5mm from quenched end) to 47-55HRC (50mm from quenched end).
+HH (High Hardenability): Minimum hardness at 1.5mm is 52HRC (vs. 50HRC for +H), ensuring deeper hardening.
+HL (Low Hardenability): Maximum hardness at 1.5mm is 55HRC (vs. 57HRC for +H), suitable for thin-section parts.
Hunan Qilu Steel offers DIN 36NiCrMo16 1.6773 in a range of forms to match customer needs, with strict tolerance controls for precision applications:
Product Type | Size Range | Length | Surface Finish & Tolerance |
Cold Drawn Bar | Φ3-Φ80mm | 6000-9000mm | Turned (+0/+3mm), Ground (+0/+0.05mm), Polished (+0/+0.05mm); Straightness 1mm/1000mm max |
Hot Rolled Bar | Φ16-Φ310mm | 6000-9000mm | Peeled (+0/+0.1mm), Black Rolled (+0/+1mm); Straightness 3mm/1000mm max |
Hot Forged Bar | Φ100-Φ1200mm | 3000-5800mm | Black Forged (+0/+5mm) |
Hot Rolled Plate/Sheet | Thickness 3-200mm; Width 1500-2500mm | 2000-5800mm | Black Rolled or Machined; Tolerance +0/+3mm (milled) |
Hot Forged Block | Thickness 80-800mm; Width 100-2500mm | 2000-5800mm | Black Forged or Machined |
Note: Due to low domestic demand in China, hot-rolled and hot-forged bars are not stocked; production is custom-ordered with a minimum order quantity (MOQ) of 10 tons.
DIN 36NiCrMo16 1.6773 is trusted in industries where failure of components could lead to costly downtime or safety risks. Its high strength, toughness, and wear resistance make it ideal for the following critical applications:
The aerospace sector demands materials that can withstand extreme loads, temperature fluctuations, and fatigue. DIN 36NiCrMo16 1.6773 is used to manufacture:
Aircraft Landing Gear: Requires high tensile strength (up to 1450Mpa for small parts) and impact resistance to absorb landing shocks.
Engine Drive Shafts: Benefits from the steel’s fatigue resistance (enhanced by Ni) to endure thousands of rotational cycles.
Turbine Components: Mo content boosts high-temperature strength, making it suitable for turbine blades and casings in jet engines.
In high-performance and heavy-duty vehicles (e.g., racing cars, trucks), DIN 36NiCrMo16 1.6773 is used for:
Engine Crankshafts & Connecting Rods: These parts endure cyclic bending and torsional stress; the steel’s 1000-1450Mpa tensile strength and 30-45J impact value prevent cracking.
Transmission Gears: Flame-hardened surfaces (53HRC) resist wear, while the core’s toughness (HRC28-32) absorbs shock during gear meshing.
For machinery operating in mining, construction, or power generation, the steel’s durability is critical:
Large Diesel Engine Crankshafts: Used in marine or industrial generators, where size (up to Φ660mm forgings) and load require uniform hardness and strength.
Mining Machinery Gears & Bearings: Wear resistance from Cr and Mo ensures longevity in dusty, high-load environments.
Gas Turbine Shafts: Withstands high rotational speeds and temperatures, thanks to Mo-enhanced high-temperature stability.
In industries like tooling and robotics, DIN 36NiCrMo16 1.6773 is chosen for:
High-Load Bearings: Tight tolerances (e.g., +0/+0.05mm for ground surfaces) ensure smooth operation, while the steel’s toughness prevents premature failure.
Precision Shafts: Low sulfur content (Max 0.025%) reduces machining defects, making it suitable for parts requiring tight dimensional accuracy.
AISI 4340 (equivalent to DIN 36CrNiMo4 1.6511) is a common high-strength alloy steel, but DIN 36NiCrMo16 1.6773 offers key advantages:
Higher nickel content (3.6-4.1% vs. 1.6-2.0% in AISI 4340) delivers superior toughness and fatigue resistance, making it better for cyclic-load applications.
Higher tensile strength (up to 1450Mpa vs. ~1250Mpa for AISI 4340) suits more demanding stress environments.
Better hardenability (via Mo and Ni) ensures uniform hardness in thicker sections (up to Φ1200mm forgings), whereas AISI 4340 may struggle with hardness uniformity in large parts.
The standard MOQ is 10 tons. This is because DIN 36NiCrMo16 1.6773 has limited domestic demand in China, so stockists do not maintain inventory. Custom production requires melting, forging, and heat treatment processes that are cost-effective only for larger batches. Hunan Qilu Steel can sometimes accommodate smaller orders for cold-drawn bars (Φ3-Φ80mm) with extended lead times—contact our team for details.
DIN 36NiCrMo16 1.6773 has relatively poor weldability due to its carbon content (0.32-0.39% > 0.25%, the threshold for reduced weldability) and high alloy content. To minimize cracking:
Preheat the steel to 200-300℃ before welding to reduce thermal stress.
Use low-hydrogen electrodes (e.g., E8018-B2) to prevent hydrogen-induced cracking.
Maintain a slow cooling rate after welding (e.g., post-weld annealing at 600-650℃) to relieve internal stress.
Avoid welding thick sections (>50mm) without preheating, as this increases cracking risk.
Three key heat treatment processes are used, depending on the application:
Soft Annealing: Heat to 650-700℃, hold for 2-4 hours, then cool in the furnace. Goal: Reduce hardness to HB269 max for easy machining.
Normalizing: Heat to 880-950℃, hold for 1-2 hours, then cool in air. Goal: Refine the microstructure and prepare the steel for quenching.
Quenching & Tempering (QT): Heat to 865-885℃ (upper end for oil quenching, lower end for water quenching), quench in water/oil/air, then temper at 550-650℃ for 2-3 hours. Goal: Achieve the desired balance of strength (1000-1450Mpa) and toughness (30-45J impact value), with a hardness of HRC28-32.
Yes. We offer a range of custom testing and certifications to meet international standards and customer requirements, including:
Mechanical testing (tensile, impact, hardness) per EN 10002-1, EN 10045-1, and EN ISO 6508-1.
Chemical composition analysis via optical emission spectroscopy (OES) or X-ray fluorescence (XRF).
Non-destructive testing (NDT) such as ultrasonic testing (UT) per EN 10160 or magnetic particle testing (MT) per EN 10228-1.
Certifications including EN 10204 3.1B (mill test certificate) or 3.2 (independent inspection certificate) for critical applications like aerospace.
1: Steel equivalent
Country | Europe |
Standard | EN10083-3 |
Grade | 36NiCrMo16/1.6773 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
36NiCrMo16/1.6773 | 0.32-0.39 | 0.4Max | 0.5-0.8 | 0.025Max | 0.025Max | 1.6-2.0 | 0.25-0.45 | 3.6-4.1 |
3: Mechanical properties .
Mechanical properties for 36NiCrMo16 quenching and tempering alloy steel according to EN10083-3.
Size range | Tensile strength | Yield strength | Alongation | Area of reduction | Impact value At RT/J |
d≤16 t≤8 | 1250-1450Mpa | 1050Mpa Min | 9% Min | 40% Min | / |
16＜d≤40 8＜t≤20 | 1250-1450Mpa | 1050Mpa Min | 9% Min | 40%Min | 30J Min |
40＜d≤100 20＜t≤60 | 1100-1300Mpa | 900Mpa Min | 10% Min | 45%Min | 35J Min |
100＜d≤160 60＜t≤100 | 1000-1200Mpa | 800Mpa Min | 11% Min | 50%Min | 45J Min |
160＜d≤250 100＜t≤160 | 1000-1200Mpa | 800Mpa Min | 11% Min | 50%Min | 45J Min |
Sampling and preparation of test pieces for 36NiCrMo16 quenching and tempering steel.
1): According to EN10083-1, all samples shall be taken at a distance of 12.5mm below the heat treated surface
2): As stipulated in the contract between buyer and seller.
Mechanical properties for 36NiCrMo16 open die forgings steel according to EN10250-3
Size range | Tensile strength | Yield strength | Alongation | Impact value at RT/J | ||
L | Tr | L | Tr | |||
d≤160 | 1000Mpa Min | 800Mpa Min | 11% Min | 8% Min | 45J Min | 22J Min |
160＜d≤330 | 1000Mpa Min | 800Mpa Min | 11% Min | 8% Min | 45J Min | 22J Min |
330＜d≤660 | 1000Mpa Min | 800Mpa Min | 11% Min | 8% Min | 45J Min | 22J Min |
Remark: L= Longitudinal Tr = Transverse
Sampling and preparation of test pieces for steel forging.
1: According to EN10250-1, all samples shall be taken at a distance of 4/T below the heat treated surface (with a minimum of 20mm and a maximum of 80mm), and t/2 from the end (where t is the equivalent thickness of the thickness of the ruling section of the forging at the time of heat treatment.
2: As stipulated in the contract between buyer and seller.
4: Surface hardness and hardenability.
Heat Treatment | Hardness |
Flame or Induction hardening | 53HRC |
Soft annealed (+A) | HB269Max |
Quenched and tempred (+QT) | HRC28-32(Common Range) |
Where the steel is ordered by using the symbols for normal (+H) or restricted (+HL, +HH) hardenability requirements, the hardenability values should apply below:
Distance in mm from quenched end | ||||||||||||||||
Distance | 1.5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | |
Hardness In HRC + H | max | 57 | 56 | 56 | 56 | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
min | 50 | 49 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | |
Hardness In HRC + HH | max | 57 | 56 | 56 | 56 | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
min | 52 | 51 | 51 | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | |
Hardness In HRC + HL | max | 55 | 54 | 53 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 |
min | 50 | 49 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | |
Scatter bands for the Rockwell - C hardness in the end quench hardenability test.
5: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Cold drawn bar | Φ3-Φ80mm | 6000-9000mm |
Hot rolled bar | Φ16-Φ310mm | 6000-9000mm |
Hot forged bar | Φ100-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:3-200mm; W:1500-2500mm | 2000-5800mm |
Hot Forged block | T: 80-800mm; W: 100-2500mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
